src/runtime/coreparse.c

   1 /*
   2  * A saved SBCL system is a .core file; the code here helps us accept
   3  * such a file as input.
   4  */
   5
   6 /*
   7  * This software is part of the SBCL system. See the README file for
   8  * more information.
   9  *
  10  * This software is derived from the CMU CL system, which was
  11  * written at Carnegie Mellon University and released into the
  12  * public domain. The software is in the public domain and is
  13  * provided with absolutely no warranty. See the COPYING and CREDITS
  14  * files for more information.
  15  */
  16
  17 #include <stdio.h>
  18 #include <sys/types.h>
  19 #include <sys/file.h>
  20
  21 #ifdef irix
  22 #include <fcntl.h>
  23 #include <stdlib.h>
  24 #endif
  25
  26 #include "os.h"
  27 #include "runtime.h"
  28 #include "globals.h"
  29 #include "core.h"
  30 #include "arch.h"
  31 #include "interr.h"
  32 #include "sbcl.h"
  33
  34 static void process_directory(int fd, long *ptr, int count)
  35 {
  36     struct ndir_entry *entry;
  37
  38     FSHOW((stderr, "process_directory(..), count=%d\n", count));
  39
  40     for (entry = (struct ndir_entry *) ptr; --count>= 0; ++entry) {
  41
  42         long id = entry->identifier;
  43         long offset = os_vm_page_size * (1 + entry->data_page);
  44         os_vm_address_t addr =
  45             (os_vm_address_t) (os_vm_page_size * entry->address);
  46         lispobj *free_pointer = (lispobj *) addr + entry->nwords;
  47         long len = os_vm_page_size * entry->page_count;
  48
  49         if (len != 0) {
  50             os_vm_address_t real_addr;
  51             FSHOW((stderr, "mapping %ld bytes at 0x%lx\n", len, addr));
  52             real_addr = os_map(fd, offset, addr, len);
  53             if (real_addr != addr) {
  54                 lose("file mapped in wrong place! "
  55                      "(0x%08x != 0x%08lx)",
  56                      real_addr,
  57                      addr);
  58             }
  59         }
  60
  61         FSHOW((stderr, "space id = %d, free pointer = 0x%08x\n",
  62                id, free_pointer));
  63
  64         switch (id) {
  65         case DYNAMIC_SPACE_ID:
  66 #ifdef GENCGC
  67             if (addr != (os_vm_address_t)DYNAMIC_SPACE_START) {
  68                 fprintf(stderr, "in core: 0x%x - in runtime: 0x%x \n",
  69                         addr, (os_vm_address_t)DYNAMIC_SPACE_START);
  70                 fprintf(stderr,"warning: core/runtime address mismatch: DYNAMIC_SPACE_START");
  71             }
  72 #else
  73             if ((addr != (os_vm_address_t)DYNAMIC_0_SPACE_START) &&
  74                 (addr != (os_vm_address_t)DYNAMIC_1_SPACE_START)) {
  75                 fprintf(stderr, "in core: 0x%x - in runtime: 0x%x or 0x%x\n",
  76                         addr, (os_vm_address_t)DYNAMIC_0_SPACE_START,
  77                         (os_vm_address_t)DYNAMIC_1_SPACE_START);
  78                 fprintf(stderr,"warning: core/runtime address mismatch: DYNAMIC_SPACE_START");
  79             }
  80 #endif
  81 #if defined(ibmrt) || defined(__i386__)
  82             SetSymbolValue(ALLOCATION_POINTER, (lispobj)free_pointer);
  83 #else
  84             dynamic_space_free_pointer = free_pointer;
  85 #endif
  86             /* on the x86, this will always be space 0 */
  87             current_dynamic_space = (lispobj *)addr;
  88             break;
  89         case STATIC_SPACE_ID:
  90             if (addr != (os_vm_address_t)STATIC_SPACE_START) {
  91                 fprintf(stderr, "in core: 0x%p - in runtime: 0x%x\n",
  92                         addr, (os_vm_address_t)STATIC_SPACE_START);
  93                 lose("core/runtime address mismatch: STATIC_SPACE_START");
  94             }
  95             break;
  96         case READ_ONLY_SPACE_ID:
  97             if (addr != (os_vm_address_t)READ_ONLY_SPACE_START) {
  98                 fprintf(stderr, "in core: 0x%x - in runtime: 0x%x\n",
  99                         addr, (os_vm_address_t)READ_ONLY_SPACE_START);
 100                 lose("core/runtime address mismatch: READ_ONLY_SPACE_START");
 101             }
 102             break;
 103         default:
 104             lose("unknown space ID %ld addr 0x%p", id);
 105         }
 106     }
 107 }
 108
 109 lispobj load_core_file(char *file)
 110 {
 111     int fd = open(file, O_RDONLY), count;
 112
 113     /* KLUDGE: This kind of conditionalization everywhere that 32-bit
 114      * ints are used is really nasty. It would be much nicer to define
 115      * a typedef like addr_as_int once and for all in each
 116      * architecture file, then use that everywhere. -- WHN 19990904 */
 117 #ifndef alpha
 118     long *header,  val, len, *ptr;
 119     long remaining_len;
 120 #else
 121     u32 *header, val, len, *ptr;
 122     u32 remaining_len;
 123 #endif
 124
 125     lispobj initial_function = NIL;
 126     if (fd < 0) {
 127         fprintf(stderr, "could not open file \"%s\"\n", file);
 128         perror("open");
 129         exit(1);
 130     }
 131
 132     header=calloc(os_vm_page_size / sizeof(u32),sizeof(u32));
 133
 134     count = read(fd, header, os_vm_page_size);
 135     if (count < os_vm_page_size) {
 136         lose("premature end of core file");
 137     }
 138
 139     ptr = header;
 140     val = *ptr++;
 141
 142     if (val != CORE_MAGIC) {
 143         lose("invalid magic number in core: 0x%lx should have been 0x%x.",
 144              val,
 145              CORE_MAGIC);
 146     }
 147
 148     while (val != CORE_END) {
 149         val = *ptr++;
 150         len = *ptr++;
 151         remaining_len = len - 2; /* (-2 to cancel the two ++ operations) */
 152
 153         switch (val) {
 154
 155         case CORE_END:
 156             break;
 157
 158         case CORE_VERSION:
 159             if (*ptr != SBCL_CORE_VERSION_INTEGER) {
 160                 lose("core file version (%d) != runtime library version (%d)",
 161                      *ptr,
 162                      SBCL_CORE_VERSION_INTEGER);
 163             }
 164             break;
 165
 166         case CORE_NDIRECTORY:
 167             process_directory(fd,
 168                               ptr,
 169 #ifndef alpha
 170                               remaining_len / (sizeof(struct ndir_entry) /
 171                                                sizeof(long))
 172 #else
 173                               remaining_len / (sizeof(struct ndir_entry) /
 174                                                sizeof(u32))
 175 #endif
 176                               );
 177             break;
 178
 179         case CORE_INITIAL_FUNCTION:
 180             initial_function = (lispobj)*ptr;
 181             break;
 182
 183         default:
 184             lose("unknown core file entry: %ld", val);
 185         }
 186
 187         ptr += remaining_len;
 188     }
 189     free(header);
 190     return initial_function;
 191 }